if this is your first grow keep it simple.
veg with the 1000w mh, flower with 1000w hps.
you should be able to an LB like this. the reason i say this is because heating issues suck and are a pain in the ass because they require handyman skills and quite frankly it's a pain in the ass, so have fun do yourself a favor and take it easy your first grow 1000w is ambitious for first grow anyways... and you wno't do everything right it's a guarantee.
don't rush man take the time learn the ropes. you'll be a lot happier... it's more fun looking at the plants than constantly having to fix and adjust things.
also all those fans and shit will get expensive. an inline fan for one of those lights is upwards of 150 bucks, plus all the ducting and shit you're looking at spending a lot of dough before you've even made any! trust me once you finish this grow you'll know EXACTLY what to do differently next time...
if the lights are cooltubed you can get them pretty close the plants, with a 1000w i'd say a foot or so for a mature plant 2.5+ ft for seedlings/clones. and definitely cooltube them. if they aren't you might have to keep them 2ft+ away and then you are just wasting a lot of that beautiful light
how many plants are you gonna have, are you starting from clone or seed? what variety plants are you using? what soil/hydro do you intend to use? what nutes are you getting? what size containers you using? there's a lot of little details to arrange before you start growing.
Dude, listen to this man. +REP for Jesus420
Heck, start with a few CFLs, some bagseed and dixie cups. Just concentrate on getting one or two seedlings up and growing.
While your seedlings are growing, set up to be able to repot into flowering containers and fertilize your plants.
While vegging in flowering containers set up to flower.
As your op progresses you will know much better what you need next, and be able to ask specific questions about your grow. A nice hydro set-up costs 2-3 grand to set up, soil ops somewhat less. Sounds like you have cash, spend it wisely.